Set-up insulation box



11,13939- P. ZALKIND SET-UP INSULATION BOX Filed April 20, 1956INVENTOR. P plca [kind ATTORNEY.

Patented July 11, 1939' UNITEDIISTATES- SET-UP INSULATION BOX PhilipZalkind, new York, N. 2. Application April 20, 1936, Serial No. 75,317

6 Claims.

My invention relates to novel heat insulated containers, and moreparticularly relates to containers formed from collapsible tubes, whichwhen integrated to form the container produce a unified rigid structure.

My invention comprises a container formed from blanks of sheet materialsuch as folding box board, corrugated board, and the like, out. scored,folded and united in a manner to provide a casing having hollow walls.These hollow walls provide dead" air spaces which effectively insulatethe container against the passage of heat. Thus with my construction acontainer is provided, the parts of which may be .folded or collapsedand be delivered and stored in this condition. At the same time the usermay set up the parts into a rigid, integrated casing,'which is at thesame time an eflicient heat insulator. Such a container may be used forthe storage of either hot or cold material, which areto be maintainedeither hot or cold, as the case may be. Thus my container is adapted tothe shipment of icecream and the like, and more particularly to thepacking of ice-cream for the retail trade where the containerisdelivered to the packer in knock down condition, and is not expectedto be returned by the consumer. However, I do. not limit the use of mycontainer to any particular purpose, as it may be used wherever heatinsulating properties are desired in containers. My container isinexpensive to construct. shipped to the packer in knockdown conditionand so stored until ready for use. It therefore requires comparativelylittle space for storing and the cost of shipment will be relativelylow. Moreover, where additional heat insulation is required, mycontainer is adapted to receive filler members which provide suchadditional'insula tion. These members may be of any well known type,but, wheresuch additional insulation is desirable, I prefer to use oneof the types of insulating filler disclosed in my. copendingapplications filed coincidently with this application and entitledCollapsible flller, Serial No. 75,314, and Insulation sheets, Serial No.75,316.

The objects of my invention are thus to provide a container that may beshipped in knock' 'down condition, that provides insulation against thepassage of heat, that is inexpensive to construct; and that is adaptedto receive an insulatingfiller. In my copending application entitledCollapsible insulating casing, Serial No.-75,315 and filed 'coincidentlywith this application I have disclosed a similar insulating containerin- 4 corporating certain of theteatures oi" the present It may bethebottom of the shell.

is folded on the score lines i between sections invention, but dineringfrom the present invention in that my copending application theinsulating container may be readily recollapsed for reshipment afteruse. There are other objects of my present invention which will be'apparent 5 from the following detailed description in connection withthe drawing, in which I Figure 1 is a developed view of a blank forforming the inner shell of my novel container.

Figure 2 is a developed view of a blank for forming the outer shell ofmy container.

Figure 3 is a perspective view, partly in section, showing my containerwith the inner shell inserted into the outer shell in automatic spacedrelation to form a container having insulating dead air spaces;

Figure 4 is a perspective view showing the inner shell made from theblank of Figure 1 in a collapsed condition.

Figure 5 is a perspective view showing the outer shell made from theblank of Figure 2 in a collapsed condition.

Figure 6 is a perspective view showing a frame for reinforcing the openedge of the shell of Figure 3.

In the blank shown in Figure 1, four sections ll, l2, l3 and I4separated by the score lines l5, form the sides of the inner shell ofthe container. Tabs I 6 extending from the upper portions of thesections II to i4 are formed by the score lines I! .andare adapted, asshown in Figure 3, to be turned back at right angles to the plane oftheir respective sections H to l4. At the bottom of the sections II to I4,,two parallel score lines l8 and I9 form the sections 2l-to 24 and 25to 28. Portions 2| to 2 4 are adapted to be turned about the score linesl8 into a reentrant position so as to'lie parallel to, and in contactwith, sections I I to l4 respectively, as illustrated in Figure.

3; and sections 25 to 28 jare adapted to turn on 40 the score lines l9to a position at'right angles to the plane of the side walls ii to l4forming The blank of Figure 1 l2 and I3. The free edge of section I4 isthus brought into contact with the free edge of section II, and thetwofree edges may be united with each other through the agency of theflap 54 integral with section i4. This flap 54; may be attached tosection II in any suitable manner, such as gluing, stitching, orstapling. The blank is thus formed intoa collapsed tube, as shown inFigure 4.

The construction of the blank for the outer shell, as shown in Figure.2, is similar in many respects to the blank of Figure 1. It comprisesthe four main sections 34, 35, 36 and 31 separated from each other bythe parallel score lines 30. Tabs 3| extending from the upper portionsof the sections 36 to 31 are formed by the score lines 38, and areadapted, as shown in Figure 3, to be turned back at right angles to theplane of their respective sections 33 to 31. At the bottom of thesections 34 to 31, two parallel score lines 39 and 5|]- form thesections 4| to 46 and 45 to 18. Portions 4| to M are adapted to be Iturned about the score lines 59 into a re-entrant position so as to beparallel to and in contact with sections 34 to 31 respectively, as shownin Figure 3; and sections 45 to 48 are adapted to turn on the scorelines 50 to a position at right angles to the plane of the side walls 33to 31, forming the bottom of the shell. The blank of Figure 2 is foldedon the score lines 3|] between sections and 36. The free edge of section31 is thus brought into contact with the'free edge of section 33, andthe two free edges may be united with each other through the agency ofthe flap 52 attached to the section 3'1. This fiap 52 may beglued to theouter face of section 33 in any well known manner. The blank is thusformed into a collapsed tube shown in Figure 5.

In setting up the collapsed inner and outer tubes to form a casing, eachof the tubes is ex-. panded on their score lines until the sides are atright angles to eachother, and the bottom closure of each is formed bybending the various bottom flaps in the manner for which they areadapted. Thus, on the inner shell the portions 2,| to 24 are 1 bent intocontact with the sections II to It respec tively, and the portions 25 to28 are then bent until they are perpendicular to the side walls I to I4.I prefer that portions 2| to 23 be provided with a remoistening gluesurface in order that they be firmly attached to their respective sidewalls. Also, I prefer that portions 26 and 28 also be provided withremoistening glue in order that they may be securely united withportions 25 and 21 which arefirst turned in. Similarly portions 4| to 43of the outer shell are turned against their respective side members 34to 31; and the bottom closure then formed by turning portions 45 to 48at right angles to the expanded side walls. These members may also besecured with remoistening glue in a manner similar to thatexplainedabove in connection with the inner shell. The flaps 3| at the top of theouter shell are turned inwardly to be' at right angles to the side walls34 to 31; and the flaps I6 of the inner shell are turned outwardly untilthey are at right angles to the side walls H to M.

In order to reinforce; the open end 'of the shell, a frame-like member,Figure 6, having outer and inner dimensions corresponding to thoseformed by the tabs 3| may be inserted in the tube formed by the sections34 to 31- to a point just below the score lines 38., This frame may besecured to the under portions of the flange formed by the sections 3|byany suitable means, as, for instance, a remoistening gummed surface. a

Thereafter the inner tube which has previouslybeen assembled, asdescribed above, is inserted into the outer shell, as shown in Figure 3.This inner shell is so proportioned that when it'is inserted within theouter shell its side walls will slide in close contact with the inturnedflange on the outer shell, formed by the top flap member 3| and theframe 53. Moreover, the length of the inner shell is so proportionedrelative to the length of the outer shell, that when the peripheralflange at the bottom of the inner shell (formed by the portions 2| to 24with their adjoining section of side walls) rests upon the bottomclosure member of the outer shell, then the outstanding flange formed bythe flaps IS on the top of the inner shell come in face 3 of the flangeformed by flaps 3| The relative width .of the sides of the inner andouter shell, together with the width of the tabs 3| on the outer shell,determine the spacing between the inner and outer shell, and thethickness of the dead" air space provided around the sides of thecontainer for insulating purposes. Similarly the width of the portions2| to 24 on the inner shell determines the thickness of the dead airspace provided at the bottom of the container for insulating purposes.These air spaces may have any desired thickness depending upon theparticular application. In general it will not be less than nor morethan 3". I have found that where no additional insulating filler is usedwith my casing, a dead" air space about a" in thickness provides anefficient heat insulation.

It will be seen that with the construction illustrated a single dead"air space is formed as insulation all round the container. Where moreeffective insulation is desired a plurality of dead air spaces, inseries with each other, may be' provided bythe insertion of a suitablefiller between the two shells, which filler will divide the air spaceprovided between the two shells into a plurality of parallel air spaces.Such filler members are fully described in my aforementioned copendingapplications entitled Collapsible filler, Serial No. 75,314, andInsulation sheets, Serial No. 75,316, and are also illustrated in myaforementioned copending application entitled Collapsible insulatingcasing, Serial No. 15,315.

The open end of the casing may be closed by means of a suitable hollowclosure member, which like the main container itself, is provided with adead air space, so as to provide a suitable insulation against thepassage of heat through the open end of the container. This closuremember may be a plug type panel which may be sprung into the open end ofthe casing; and may be constructed in a manner similar to certain of thevarious modified forms of plug type panels shown in my copendingapplication, Serial Number 45,708 filed October 19, 1935.

' One form of hollow plug closure member suitable for use with my novelcontainer is shown in detail in my aforementioned copending application,Serial No; 45,708, filed October 19, 1935.

It will be understood that the particular form of container described isshown by way of illustration only, andthat many modifications may bemade without departing from the scope and spirit of my invention asexpressed in the attached claims. Now having described my invention in amanner that it may be readily understood by one skilled in the art, Iclaim:

1. A rigid insulating casing of fibrous sheet material comprising aninner shell and outer shell; said inner shell having side walls, abottom wall, a downwardly depending flangeat the 'junction of said sidewalls and said bottom wall, and an outstanding flange at the upperextremity of the side walls; said outer shell having side walls,

a bottom wall, and an inwardly projecting flange at the upper extremityof the side walls; said inner I and outer shell being united with eachform saidv insulating casing; said shells being united through the.topoutstanding fiangesof said inner shell and the topinwardly projectingflanges .01 said outer shelLthe latter also being secured'to a frame ofsheet material fitting around said inner shell and within said outershell.

2. A rigid insulated casing. comprising an' inner shell and an outershell; said inner shell being formed from a blank of sheet materialhaving sidewalls defined by scorelines, fiaps at one end of said blankfor forming outstanding flanges on said inner shell, and fiaps at theother end of i said blank for forming a raised bottom panel for saidinner shell; said outer shell being'tormed from a blank or sheetmaterial having side walls defined by score lines, flaps at one end ofsaid junction of said side walls and said bottom 'wall;

said outer shell having side walls and bottom v a wall, a downwardlydepending flange at thejunc- I tion. of. said side and bottom walls,said 188tmentioned fiangeproviding a basal s pport for said outer shellamass:

otherto mentioned and supporting thebottom of --saidcasing.,

casing of fibrous sheet material comprising aninner shell and an outershell: said inner shell having side walls, a bottom wall, a fiange atthe junction 01 said side walls and said bottom wall; said outer shellhaving' side walls andbottom wall, a flange at the Junction of saidaide'and bottom walls. said lastflangeproviding a basal support for saidoutersheli and supporting the bottom of '5. An insulating casing offibrous sheet material comprising an inner shell and an outer shell,each of said shells being provided with score lines for forming casingsfrom a collapsed blank, each of the shells when in assembled positionhaving side walls and bottom wall and means for inner shell in spacedrelation with respect to said side and bottom walls of said outer shell,'said means comprising flanges formed from score lines ln said blanks.

*6. An insulating casing of fibrous sheet materialcomprising aninnershell and an outer shell,

, each of said shells being provided with score lines .ior formingcasings from a collapsed blank, each of the shells when in assembledposition having side walls and bottom wall and means for maintainingsaid side and bottom walls of said inner maintaining said side andbottom walls oi said shell in spaced relation with respect to said sideand bottom walls of said outer shell, said means comprising flangesformed in said inner shell from score lines inthe inner shell blank.

